Home / 742,571.12-1,024,572.50-420,281.21

Finding the Fourth Proportional to 742,571.12, 1,024,572.50 and 420,281.21

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Solution

The fourth proportional to 742,571.12, 1,024,572.50 and 420,281.21 is: 579,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,571.12 : 1,024,572.50 = 420,281.21 : x
  2. Step 2: Convert to fraction form
    742,571.12/1,024,572.50 = 420,281.21/x
  3. Step 3: Cross multiply
    742,571.12x = 1,024,572.50 × 420,281.21
  4. Step 4: Simplify right side
    742,571.12x = 430,608,564,909.86
  5. Step 5: Solve for x
    x = 430,608,564,909.86/742,571.12
  6. Step 6: Final answer
    x = 579,888.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.